Viagra & sildenafil: effects, timing and side effects

For general education. This is not a diagnosis or prescription. Personal treatment decisions belong with a qualified clinician.

What is Viagra, and is it the same as sildenafil?

Sildenafil is a medicine used for erectile dysfunction. Viagra is one of its brand names. It is not an Ayurvedic remedy or a botanical supplement.

Who is Viagra suitable for?

Erection problems can have physical and psychological causes. A clinician can assess your health, medicines and treatment options. Do not select a dose from an online article.

When does Viagra start working?

Pfizer’s prescribing information describes use approximately one hour before sexual activity, with a window from 30 minutes to four hours beforehand. That is a timing instruction, not a promise of a continuous erection or an identical effect for every person. Follow your own prescription and exact leaflet.

What are the side effects of Viagra?

Reported effects include headache, flushing, indigestion, nasal congestion and visual changes. Nitrates and riociguat are contraindicated; other medicines can also interact. An erection lasting over four hours, sudden sight loss or sudden hearing loss needs urgent medical attention. Read the full leaflet for the complete safety information.

Which combinations with sildenafil are dangerous?

Do not combine sildenafil with nitrate medicines or poppers. Tell your clinician about all medicines and supplements. If you develop chest pain, sudden vision loss or a prolonged painful erection, seek urgent medical attention.

Viagra in Israel: availability and price

Check the Israeli Ministry of Health drug registry for the exact registered product, leaflet and listed price. Compare the listed price with the exact strength and pack quantity. Confirm availability and any delivery charge directly.

How does Viagra work in the body?

Sildenafil helps blood flow to the penis during sexual stimulation. It does not create sexual desire, cure every cause of erectile dysfunction or protect against sexually transmitted infections. A change in desire and difficulty maintaining an erection are different concerns; the treatment question depends on which symptom is present.

How long does Viagra last?

The leaflet’s window for taking Viagra before sexual activity is not a guarantee of a fixed duration of effect. It does not mean an erection should last for hours. Response varies, and a meal high in fat can delay the start of action. An erection lasting more than four hours requires urgent medical attention.

Generic Viagra, Cialis or another option?

Generic sildenafil contains the same active ingredient associated with Viagra; tadalafil, the ingredient in Cialis, is a different medicine. Compare the exact strength, formulation and approved leaflet rather than tablet colour. The linked Viagra–Cialis comparison explains the differences; the erectile dysfunction guide covers options beyond tablets.